Music related brand

I am eager to try playing musical instruments especially piano. After tying to accomplish learning the guitar and still tying. I am planning to try piano this time since we also have a piano. The husband usually the one using the piano. He is also teaching dallas playing the piano. However, I think the little dude had a thing for drums and guitar. He is like those new kids today that enjoy rock music. Therefore, guitar and drums is his choice. I wonder if there is a store offers huge selection of electric guitars and that rme drums that guaranteed lowest prices. It would be a big relief and help for us if we can buy it budget friendly.